1. The Abnormal Threshold Anomaly in the 6Li + 208Pb System.
- Author
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Huang, Z. J., Lin, C. J., Yang, L., Jia, H. M., Yang, F., Ma, N. R., Wen, P. W., Luo, T. P., Chang, C., Duan, H. R., Zhu, S. X., Yin, C., and Yang, J. H.
- Subjects
NUCLEAR optical potentials ,OPTICAL dispersion ,ANGULAR distribution (Nuclear physics) ,ELASTIC scattering ,NUCLEAR energy - Abstract
Numerous studies have demonstrated that the phenomenological optical potential of tightly bound nuclear systems presents a threshold anomaly phenomenon in the near-Coulomb barrier energy region, where the relationship between the real and imaginary potentials can be well described by the dispersion relation. However, for some weakly bound nuclear systems, the phenomenological optical potential seems to manifest differently, and the dispersion relation struggles to describe the behavior between real and imaginary potentials. Recently, we measured the angular distributions of the transfer reaction
207 Pb(7 Li,6 Li)208 Pb in both near and deep barrier energy regions, as well as the elastic scattering angular distributions of the entrance channel 7Li+207 Pb. Optical potentials of the6 Li+208 Pb system were extracted.The current results indicate that the optical potentials exhibit an abnormal threshold anomaly, and the dispersion relation is not applicable. Possible explanations are discussed, yet further investigations into the underlying physics are required. [ABSTRACT FROM AUTHOR]- Published
- 2024
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